JPH01260134A - Structure of junction between closed section steel framed member and another steel framed member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joint structure between a steel frame member having a closed cross section, such as a square steel pipe column and a steel beam, and another steel frame member.

[Conventional technology]

Generally, in steel-framed buildings, closed-section steel materials such as square steel pipes and circular steel pipes are used for column members, and steel materials such as ■-shaped steel and H-shaped steel are used for beam members. Ru.

To join a beam to a column, a bracket is provided protruding from the beam, and a flange plate or splice plate is attached to the bracket and bolted, or the beam is directly welded to the column. It is common to join using metal fittings.

By the way, joining using joining hardware can save labor in steel processing,
In addition, it has been widely used in recent years because it has many advantages such as being easy to transport and handle, and improving the accuracy of processing and construction.

[Problem to be solved by the invention]

However, when the column material is made of H-beam steel, etc., it is easy to join using metal fittings, but in the case of closed cross sections such as square steel pipes, it is better to attach the metal fittings from the back side. It may be extremely difficult or impossible to install at all without any machining.

This invention was proposed in order to solve the above-mentioned conventional problems, and the present invention has been proposed to solve the above-mentioned conventional problems. The purpose of this invention is to provide a joint structure for joining members, and this invention relates to a joint structure for joining steel frames with closed cross sections, such as square steel pipes and circular steel pipes, with other steel frames. Drill a mounting hole on the side of the member 7.
Install an anchor nut on the back side of the mounting hole, and attach a male thread on the outer periphery and a female thread on the inner periphery of the anchor nut.
A cylindrical body having a flange on the inner end and a tooth profile or a wrench hook on the outer periphery of the flange is screwed from the front side of the steel member,
Moreover, it is characterized in that a connecting member for joining another steel frame member is screwed into the tapped hole of the cylindrical body.

[Example〕 The present invention will be explained below with reference to an illustrated embodiment.

In Figure 1, number 1 is a steel member with a closed cross section such as a square steel pipe, number 2 is an anchor nut, number 3 is a cylinder, and number 4 is installed to prevent the rear cylinder 3 from loosening. Numeral 5 is a connecting bolt for connecting a bracket or the like to the side of the steel frame member 1 (see Fig. 3).

The anchor nut 2 is installed on the back side of a mounting hole 6 bored in the side of the steel frame member 1.

Further, the outer periphery of the cylindrical body 3 has a male thread 7, and the inner periphery of the cylindrical body 3 has a screw hole 8.

Furthermore, a flange portion 9 that is one size larger than the inner diameter of the mounting hole 6 is formed at the outer end of the cylindrical body 3 .

A tooth profile 10 or a wrench hook 11 is formed on the outer periphery of the collar portion 9 (see FIGS. 5, 7, and 9).

The cylindrical body 3 is attached to the attachment hole 6 by being screwed onto the anchor nut 2.

When attaching the cylindrical body 3, a jig such as a spanner is hooked onto the tooth profile 10 on the outer periphery of the flange 9 or a wrench hook, and the cylindrical body 3 is tightened.

Incidentally, the flange 9 of the cylinder 3 may be omitted, and the cylinder 3 and the locking nut 4 may be integrally formed (see FIG. 2).

Next, we will explain how to install it.

■ First, a mounting hole 6 is drilled in the side of the steel frame member 1 (see Fig. 6).

■ Next, install the anchor nut 2 on the back side of the mounting hole 6 (see Figure 16).

To install the anchor nut 2, the anchor nut 2 is temporarily fixed to an angle material, wood, etc., and inserted into the back side of the steel frame member 1 from the end.

Then, it is installed on the back side of the mounting hole 6 and temporarily fixed.

(2) Next, the cylindrical body 3 is attached to the anchor nut 2 by screwing it from the front side of the attachment hole 6 with the side without the flange 9 first (see FIG. 17).

As a general rule, operations ① to ① are performed at the factory during steel frame processing.

(2) Next, at the construction site, when attaching a bracket or the like, the connecting bolt 5 is screwed into the screw hole 7 (see Fig. 18).

A locking nut 4 is screwed onto the connecting bolt 5, and after the connecting bolt 5 is screwed, the locking nut 4 is tightened to completely fix the connecting bolt 5.

FIG. 19 shows a method of joining beams using the so-called paddle method, in which an oar-shaped joint metal fitting 12 is attached by screwing the male screw part 12a at the tip into the screw hole 8 of the cylinder body 3. , a steel beam is bolted and joined to the flange portion 12b on the rear end side.

The mounting method is approximately the same as that shown in FIG.

8 to 15 show other cylindrical bodies 3. Of these, the cylindrical bodies 3 shown in FIGS. 8 and 9 have a tapered tip so that the cylindrical body 3 is made of a steel frame member. This makes it easy to attach to the attachment hole 1 and the anchor nut 2.

Also, Figures 10.11, 12.13 and 14.15
The figures show the cylindrical body 3 manufactured in a split type. Among these, Fig. 10.11 shows a 2-split type cylindrical body, Fig. 12.13 shows a 3-divided type cylindrical body, and the 14th Figure 15 shows each of the four-split cylinders.

In the figure, numbers 13 and 14 indicate a convex portion and a concave portion, respectively.
This is to prevent the divided bodies from shifting laterally by fitting into each other when the divided bodies are assembled together.

In the embodiment, the connection structure between columns and beams in a steel frame structure has been described, but the present invention is not limited to this, and it is also possible to connect columns and threaded reinforcing bars in a steel reinforced concrete structure (see FIG. 20).

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

■ Even on steel frame members, such as square steel pipes and circular steel pipes, where it is extremely difficult to attach joint fittings from the back side, the structure allows all fittings to be installed from the front side at the construction site. Joining work can be done extremely easily.

■ Also, when attaching the cylindrical body to the anchor nut from the front side of the installation hole of the steel frame member, a tooth profile or a spanner hook is formed on the outer periphery of the flange, so hook a jig such as a spanner onto this tooth profile or spanner hook. The cylindrical body can be easily and reliably tightened.

[Brief explanation of the drawing]

Figures 1 and 3 are longitudinal cross-sectional views showing the structure of the joint according to the present invention, and Figure 2 is also the same (a partial vertical cross-sectional view showing the structure of the joint; Figure 4 shows the
6 and 8 are partially cutaway side views of the cylindrical body;
Figures 7 and 9 are side views thereof, Figures 10 to 15 similarly show the cylinder, and Figures 10, 12, and 14 are side views of the divided body of the cylinder. Figures 11, 13, and 15 are cross-sectional views of the cylindrical body, and Figures 16, 17, and 18 are joints showing how to connect steel members with closed cross sections and threaded reinforcing bars. FIG. 19 is a vertical cross-sectional view showing a method of joining columns and beams using the paddle construction method, and FIG. 20 is a cross-sectional view showing a method of joining a steel frame member with a closed cross section and a threaded reinforcing bar. 1... Steel frame member, 2... Anchor nut, 3...
Cylindrical body, 4... Binding nut, 5... Connection bolt, 6...
...Mounting hole, 7...Male thread, 8...Screw hole, 9...
・Flame part, 10...Tooth profile, 11...Spanner hook, 12
... Joining hardware, 13... Convex part, 1°4... Concave part,
15...Screw reinforcing bar. Fig. 4 3 Fig. 5

Claims (1)

[Claims] 1. A mounting hole 6 is bored in the side of the steel frame member 1 with a closed cross section, and an anchor nut 2 is installed on the back side of the mounting hole 6, and the anchor nut 2 A cylindrical body 3 is provided with a male screw 7 on the outer periphery from the front side of the steel frame member 1, a screw hole 8 on the inner periphery, a flange 9 on the outer end, and a tooth profile 10 or a wrench hook 11 on the outer periphery of the flange 9. A steel frame member with a closed cross section and another steel frame member are screwed together, and a connecting member 5 for joining another steel frame member is screwed into the screw hole 8 of the cylinder body 3. Joint structure.